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  5. Acids, Bases and Salts / अम्ल, क्षार एवं लवण

Railways General Science & Technology Acids, Bases and Salts / अम्ल, क्षार एवं लवण Sample Paper Acids and Bases Sample Test Paper-16

  • question_answer
    The pH of fresh ground water slightly decreases upon exposure to air because

    A)  Carbon dioxide from air is dissolved in the water

    B)  Oxygen from air is dissolved in the water

    C)  The dissolved carbon dioxide of the ground water escapes into air

    D)  The dissolved oxygen of the ground water escapes into air

    Correct Answer: A

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